| part; axis; aclinic line, magnetic equator; agonic line; isogonic line, isogonal line, isogone; crest; timber line, timberline, tree line; snow line; fault line; great circle; hemline; hipline; hipline; horizon, apparent horizon, visible horizon, sensible horizon, skyline; isogram, isopleth, isarithm; flight line; line of sight, line of vision; latitude, line of latitude, parallel of latitude, parallel; lunar latitude; path, route, itinerary; quadrant, quarter-circle; rhumb line, rhumb, loxodrome; danger line; side; waterline, water line, water level; water line, watermark; watershed, water parting, divide; path, track, course; line of force, field line |